agentcash Wallet & Paid APIs

Call any x402-protected API with automatic payment. Payment is the authentication — no API keys or subscriptions needed.

Setup

If the agentcash MCP is not yet installed, see rules/getting-started.md for installation and wallet setup.

Wallet Management

Your wallet is auto-created on first use and stored at ~/.agentcash/wallet.json.

Check Balance

agentcash.get_wallet_info()

Returns wallet address, USDC balance, and deposit link. Always check before expensive operations.

Redeem Invite Code

agentcash.redeem_invite(code="YOUR_CODE")

One-time use per code. Credits added instantly. Run get_wallet_info after to verify.

Deposit USDC

1. Get your wallet address via agentcash.get_wallet_info
2. Send USDC on Base network (eip155:8453) to that address
3. Or use the deposit UI: https://x402scan.com/mcp/deposit/<wallet-address>

Important: Only Base network USDC. Other networks or tokens will be lost.

Calling Paid APIs

1. Discover endpoints

agentcash.discover_api_endpoints(url="https://stableenrich.dev")

Returns all endpoints, pricing, and usage instructions. Read the instructions field — it has critical endpoint-specific guidance.

2. Check schema (optional)

agentcash.check_endpoint_schema(url="https://stableenrich.dev/api/apollo/people-search")

Returns full request/response JSON schemas and pricing for a specific endpoint.

3. Make a paid request

agentcash.fetch(
  url="https://stableenrich.dev/api/apollo/people-search",
  method="POST",
  body={"person_titles": ["CEO"], "person_locations": ["San Francisco"]}
)

Payment is automatic: sends request, gets 402 challenge, signs USDC payment, retries with credential, returns result. Payments settle only on success (2xx) — failed requests cost nothing.

Available Services

Origin	Service	What it does
https://stableenrich.dev	StableEnrich	Research APIs: Apollo (people/org), Exa (web search), Firecrawl (scraping), Grok (X/Twitter), Google Maps, Clado (LinkedIn), Serper (news/shopping), WhitePages, Reddit, Hunter (email verification), Influencer enrichment
https://stableupload.dev	StableUpload	Pay-per-upload file hosting. 10MB/$0.02, 100MB/$0.20, 1GB/$2.00. 6-month TTL
https://stablestudio.dev	StableStudio	AI image/video generation: GPT Image, Flux, Grok, Nano Banana, Sora, Veo, Seedance, Wan
https://stablesocial.dev	StableSocial	Social media data: TikTok, Instagram, X/Twitter, Facebook, Reddit, LinkedIn. $0.06/call, async two-step
https://stableemail.dev	StableEmail	Send emails ($0.02), forwarding inboxes ($1/mo), custom subdomains ($5)
https://stablephone.dev	StablePhone	AI phone calls ($0.54), phone numbers ($20), top-ups ($15)
https://stablejobs.dev	StableJobs	Job search via Coresignal

Run agentcash.discover_api_endpoints(url="<origin>") on any origin to see its full endpoint catalog.

Quick Reference

Task	Tool
Check balance	agentcash.get_wallet_info
Redeem code	agentcash.redeem_invite(code="...")
Discover endpoints	agentcash.discover_api_endpoints(url="...")
Check pricing/schema	agentcash.check_endpoint_schema(url="...")
Paid POST request	agentcash.fetch(url="...", method="POST", body={...})
Paid GET request	agentcash.fetch(url="...")
Authenticated GET (no payment)	agentcash.fetch_with_auth(url="...")

Tips

• Always discover first — the instructions field has critical endpoint-specific patterns and required parameters.
• Payments settle only on success (2xx) — failed requests cost nothing.
• Use check_endpoint_schema when unsure about request/response format.
• Independent agentcash.fetch calls can run in parallel for better throughput.
• Network: Base (eip155:8453), Currency: USDC.

Troubleshooting

Issue	Solution
"MCP tool not found"	Reinstall MCP, restart IDE
"Insufficient balance"	Check balance, deposit USDC or redeem invite code
"Payment failed"	Transient error — retry the request
"Invalid invite code"	Code already used or doesn't exist
Balance not updating	Wait for Base network confirmation (~2 sec)